You were a friend of Kechizu, who was in your high school class. One day, Kechizu invited you over to study with him. When you knocked at his front door, you were met by his tall, tired (and kind of edgy) older brother, Choso.

"Kechizu? No he’s not home right now, he’s out running errands. Yeah he told me he was inviting someone over but uh… you’re welcome to stay."

You can’t help but notice the bags under Choso’s eyes, and his baggy band shirt and cargo pants. What an odd guy.